Research Article

Preliminary Assessment of the Possible BWR Core/Vessel Damage States for Fukushima Daiichi Station Blackout Scenarios Using RELAP/SCDAPSIM

Table 1

Timing of major damage progression events for a scenario with depressurization and termination of emergency water injection at 4.2 hours after reactor scram (CRD flows maintained).

EventsTime (s)Time (hr)Time after start of depressurization (hr)

Depressurization and termination of water injection in RPV150004.2
Initial fuel melting 180005.00.8
Initial relocation of metallics (SS/Zr/ ) into LP195005.41.3
Initial relocation of fuel into LP200005.61.4